Related by context. Frequent words. (Click for all words.) 65 optical telescope 60 Kitt Peak 58 observatory 57 telescope 55 ESO Very Large Telescope 55 LSST 54 telescopes 52 optical telescopes 52 Resolution Imaging 52 WM Keck Observatory 51 Palomar Observatory 51 Very Large Telescope 51 Thirty Meter Telescope 50 THEMIS 50 JWST 49 IceCube 49 Telescope 49 beamline 49 infrared telescope 49 LIGO 48 Lowell Observatory 48 interferometer 48 astronomical observatory 48 NRAO 48 adaptive optics 47 transmission electron microscope 47 Observatory 47 HiRISE 47 spectrometer 46 CALIPSO 46 Hubble Space Telescope 46 Hubble 46 COROT 46 observatories 46 Lunar Reconnaissance Orbiter 46 Planetary Laboratory 46 scanning electron microscope 45 orbiting telescope 45 ICESat 45 Mars Reconnaissance Orbiter 45 Observatories 45 Ball Aerospace 45 gravitational wave 44 NASA Lunar Reconnaissance 44 planetarium 44 GLAST 44 Webb Space Telescope 44 Gemini Observatory 44 Very Large Array 44 infrared wavelengths 44 spectrometers 44 Spectrometer 44 XMM Newton 43 Cassini spacecraft 43 New Horizons spacecraft 43 astronomers 43 Solar Dynamics 43 NASA Chandra 43 hyperspectral 43 CloudSat 43 optical microscope 43 Space Telescope 43 synchrotron 43 Cassini Huygens 42 Smithsonian Astrophysical Observatory 42 collider 42 X ray Observatory 42 distant galaxy 42 astronomy 42 astronomical objects 42 National Ignition Facility 42 spacecraft 42 Alpha Magnetic Spectrometer 42 Orbiting Carbon Observatory 42 Hubble telescope 42 ASTER 42 Global Surveyor 42 Large Hadron Collider LHC 42 Stardust spacecraft 42 Hubble Telescope 42 Andromeda galaxy 42 Deep Impact spacecraft 42 orbiting 41 NASA Mars Reconnaissance 41 Andromeda Galaxy 41 Pascua Lama 41 Spitzer Space Telescope 41 Orion Nebula 41 distant galaxies 41 particle accelerators 41 twin rovers 41 NASA Kepler 41 quasars 41 imager 41 LBT 41 Geostationary Operational Environmental 41 impactor 41 particle accelerator 41 supernova explosion 40 field Infrared Survey 40 Orion spacecraft